Языки общения. Частная парковка Дополнительная плата. Приоритетный трансфер до аэропорта. Открыть меню навигации. Сколько стоит насадки для аппаратов lpg апарат в объекте размещения voco Guangzhou Shifu costume Voco Guangzhou Shifu подойдет путешественникам, которые хотят получше изучить город. Правила объекта размещения Время заезда и выезда.
- Смас лифтинг аппарат лучший
- Co2 rf лазерная аппарат
- Fg2000b диодный лазер характеристики на английском
- Узи денситометрия аппарат варна
Three One 2 for men's clothing and accessories
In this experiment, we use tray dryer as a method of drying the sample. In tray dryers, the food is spread out, generally quite thinly, on trays in which the drying takes place. Coconut pulps are used as sample in this experiment as they contain a just amount of moisture needed for this short period of experiment. The drying rate of coconut pulps is what this experiment focused on and how the parameters such as temperature, flow of air and the surface area of coconut pulps exposed to the surrounding affected the drying rate.
The data is taken every 10 minutes. The measurement of the moisture content is based on the weight of the sample which inversely proportional with the temperature and time. Most tray dryers are heated by air, which also removes the moist vapours. Based on the data from the experiment, we can see that the mass and the moisture content decreasing as the time increase. The drying rate is varying rapidly with time. The experiment done is successful. A dryer is used for the evaporation of liquid from solids. Most types of dryers are indirectly heated with either an internal exchanger coil or an external heat transfer jacket.
This allow the use of remote heating. Many dryer operate under a vacuum to facilitate this evaporation. Dryer are used to remove moisture from almost any material from powders and flakes pharmaceutical and chemical processes to pellets,sheets and fibers in the plastics and textile industries. There are applications for dryers in the minning, food, printing, and paper industries as weel. Many materials need to be dried as art of their finishing operation [1].
These basic types of tray dryer cabinets; batch, semi-continuous and cross flow dryers and tray dryer. First batch cabinets are the simplest and cheapest to construct. The cabinet is a simple large wooden box fitted with internal runners to support the trays of food being processed. The trays are loaded into the chamber, the doors closed and heated air is blown through the stack of trays until the entire product is dry. As the hot air enters below the bottom tray, this tray will dry first.
The last tray to dry is the one at the top of the chamber. Next , Semi-continuous cabinets were developed by Practical Action in order to overcome some of the disadvantages of the batch system. It is thus possible to remove the lowest tray as soon as the product is dry. The mechanism then allows all the trays to be lowered now tray 2 is at the bottom of the stack. This leaves a space at the top of the stack to load a tray of fresh material. Two types of lifting mechanism are available both of which activate four movable fingers that lift the second tray upwards. Then, In this chamber the air is blown, through a series of louvers, directly across the trays and then re-circulated over the heater.
In the early stages of drying, when a lot of water is being removed, a high proportion of the air is vented to an exit and replaced by fresh air. As drying proceeds the proportion of vented air is reduced. At the end of the drying cycle no air is vented. The dyer tray are tight fitting in the cabinet to prevent air from bypassing the material to be dried. Depending upon the food and the desired final moisture, drying time may be of the order of 10 or even 20 hours.
Tray dryer require low capital and maintenance cost. The purpose of this experiment is to determine the drying rate of the sample by drying method using tray dryer besides learn to use and operate the tray dryer. A dryer which is used for drying of the wet products like crude drugs, chemical, powders or the granules is known as tray dryer. A laboratory oven is the very simple form of it which contains a cabinet with a heater at the bottom. The values of these ovens are very less because of its uncontrollable heat transfer or humidity meter. The direction circulation form is the best type of a tray dryer. In these dryer the air is heated and is focused across the object in a controlled flow.
This drying method can be classified as batch process where the sample is inserted in drying equipment for the certain time. Drying processes can also be categorized according to the physical conditions used to add heat and remove water vapour. In this experiment all the parameters reading collected need to be related with the drying rate. Before run the experiment, the tray must be weighing first without the sample. Then, weight the tray with the sample and record the values. The parameters value that need to be recorded for every 10 minute such as air velocity, percentage of air humidity , temperature dry bulb inlet and temperature dry bulb outlet. The important parameter in this experiment is to find the drying rates of the sample used by the equation below.
Mass of the evaporated water can be find when the mass of the sample recorded for every 10 minutes is minus with the sample of sample. Four trays have been weighted by put them on the racks that attached to digital balance. The value of temperature and humidity were taken from the control panel after 10 minutes ends. The velocity is recorded by placing anemometer at the end of the chamber. The reading was taken by 10 minutes interval for total of 90 minutes or until the humidity reading shows a constant value. Initial mass of sample kg 0. The objectives of this experiment are to determine effect of air temperature and air velocity to the drying rate.
In this experiment, grated coconut are used because they have low moisture content thus, require short drying time. The air is heated using conduction or radiation and inserted into the trays. The heated air is useful to remove the moist vapours. According to this experiment, the mass of the tray of grated coconut is decreasing as time proceeds. This has been proven in graph of moisture content vs time the drying rate is determined from the gradient of the graph. In this case, the graph has a negative gradient. The drying rate are 0. However, theoretically, the drying rate should increase as the temperature of air increase. The results obtained behave is such way might be due to the heater power is remained constant at 2 KW.
According to the experiment, the average value of dry bulb T1 and T2 are The difference in temperature may be due to the size of grated coconut which will effect the drying rate as the larger the surface area, the higher the drying rate. Based on the experiment, we can observed that the loss of moisture content gets higher as the drying rate increase. It is shown from the graph of drying rate versus moisture content. The drying rate can be determined from the slope of the graph which is 0.
It proves that as the air velocity increase, the drying rate is proportional to the moisture content. In this experiment, the effect of air temperature and air velocity on drying rate is determined. A tray dryer is an equipment which can be used to determine well the drying rate of a wet substance. Theoretically, the drying rate depends on the temperature of the air. The larger the difference between T1 and T2, the higher the drying rate.
However, in our experiment, the drying rate doesnt seems to be high as we keep the heat power input at a constant value. Thus, we concluded that the drying rate is directly proportional to the temperature of the inlet air provided that the moisture content of the inlet is maintained. The effect of air velocity is also known to be proportional to the drying rate. By setting the tray dryers with suitable temperature that suits the components for drying. Carneige P. Открыть меню навигации. Закрыть список предложений Поиск Поиск. Пользовательские настройки. Tray Drier Lab Report. Загружено: Fatinnnnnn. Улучшено с помощью ИИ. The document summarizes an experiment that used a tray dryer to dry coconut pulp samples.
Key parameters like temperature, air flow, and exposed surface area of the coconut pulp were varied to analyze their effect on drying rate. Moisture content and mass of the samples were measured every 10 minutes. Results showed moisture content and mass decreased with increased time as expected. Drying rate also varied rapidly with time in the beginning but slowed down as moisture content reduced. Graphs of moisture content vs time and drying rate vs moisture content were linear. The experiment successfully analyzed how parameters affected coconut pulp drying rate in a tray dryer. Описание с поддержкой ИИ.
Сведения о документе нажмите, чтобы развернуть сведения о документе The document summarizes an experiment that used a tray dryer to dry coconut pulp samples. Исходное описание: tray drier. Поделиться этим документом Поделиться или встроить документ Параметры публикации Опубликовать в Facebook, откроется новое окно Facebook. Этот документ был вам полезен? Это неприемлемый материал? Скачать сейчас.
Костюм мастера кунг-фу
Добавить объект размещения. Количество номеров и гостей. Все объекты размещения в г. В г. Выбрать номера. Последнее бронирование 4 ч назад.
Мем: "Анальный мастер"
In this experiment, we use tray dryer as a method of drying the sample. In tray dryers, the food is spread out, generally quite thinly, on trays in which the drying takes place. Coconut pulps are used as sample in this experiment as they contain a just amount of moisture needed for this short period of experiment. The drying rate of coconut pulps is what this experiment focused on and how the parameters such as temperature, flow of air and the surface area of coconut pulps exposed to the surrounding affected the drying rate. The data is taken every 10 minutes. The measurement of the moisture content is based on the weight of the sample which inversely proportional with the temperature and time.
Написать комментарий